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1 Research significance and study area GEOCHEMISTRY of organic matter in metallic ore deposits and the role of organic matter in metallogenesisare the hot subjects of research in the field of ore deposits and also a weak link in this field. Widespreadin the areas of Tongren, Danzhai, etc. in eastern Guizhou (simplified as southeastern Guizhou or Qiandongnan below) are large-sized Hg (dominant), Sb, and Au deposits, while in the areas of Qinglong,Xingren, Zhenfeng, Anlong, etc. In southwestern Guizhou (simplified as southwestern Guizhou orQianxinan below) are a number of large-sized and extremely large-sized microfine disseminated gold deposits and Sb and Hg deposits. Studies have shown that their ore-forming temperatures are estimated al<150℃ for Hg deposits, about 180℃ for Sb deposits and<200℃ for most Au deposits, respectively, allof them belonging to the typical low-temperature deposits. Not a few researchers have found bitumens in
1 Research significance and study area GEOCHEMISTRY of organic matter in metallic ore deposits and the role of organic matter in metallogenesisare the hot subjects of research in the field of ore deposits and also a weak link in this field. Widespreadin the areas of Tongren, Danzhai, etc. in eastern Guizhou (simplified as southeastern Guizhou or Qiandongnan below) are large-sized Hg (dominant), Sb, and Au deposits, while in the areas of Qinglong, Xingren, Zhenfeng, Anlong, etc. In southwestern Guizhou (simplified as Southwestern Guizhou orQianxinan below) are a number of large-sized and extremely large-sized microfine disseminated gold deposits and Sb and Hg deposits. Studies have shown that their ore-forming temperatures are estimated al <150 ° C for Hg deposits, about 180 ° C for Sb deposits and <200 ℃ for most Au deposits, respectively, allof them belonging to the typical low-temperature deposits. Not a few researchers have found bitumens in